title: Seasonal variations in physico-chemical parameters and heavy metals in water and sediments of Uppanar estuary, Nagapattinam, India.
abstract: The present study was carried out to determine the physico-chemical characteristics and heavy metals in water and sediments in Uppanar Estuary, Nagapattinam, Southeast coast of India during January to December 2007. The minimum and maximum values of atmospheric and surface water temperatures (degrees C), salinity (per thousand), pH and dissolved oxygen (ml l(-1)) were: 26.0-35.0; 25.0-33.5; 8.0-35.0; 7.2-8.2 and 2.8-5.5 respectively. The ranges of nitrate, nitrite, phosphate and silicate were: 7.05-24.23; 0.82-3.15; 0.31-2.18 and 40.0-198.0 (microM) respectively. The ranges of heavy metals in water (microg 1(-1)) and sediment (microg g(-1)) copper zinc, cadmium and mercury were: 2.45-18.25; 26.43-101.24; 1.23-24.35 and 0.01-0.22 and 5.02-81.27; 22.47-75.42; 2.25-10.06 and 0.01-0.16 respectively.
authors.affiliation: Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai - 608 502, Tamil Nadu, India.
authors.forename: R
authors.initials: R
authors.lastname: Sankar
authors.forename: L
authors.initials: L
authors.lastname: Ramkumar
authors.forename: M
authors.initials: M
authors.lastname: Rajkumar
authors.forename: Jun
authors.initials: J
authors.lastname: Sun
authors.forename: G
authors.initials: G
authors.lastname: Ananthan
mesh_terms: D004785:Environmental Pollutants / Q000737:chemistry*; D019015:Geologic Sediments / Q000737:chemistry*; D007194:India; D019216:Metals, Heavy / Q000737:chemistry*; D045483:Rivers / Q000737:chemistry*; D012621:Seasons
chemical_list: D004785:Environmental Pollutants; D019216:Metals, Heavy